JPH0553030A - Connecting device for waveguide and optical fiber - Google Patents

Abstract

PURPOSE:To execute a signal processing by leading an output signal of an optical branch/coupling waveguide to different places. CONSTITUTION:A waveguide tip in which plural optical branch/coupling waveguide patterns are formed is contained in a fixed member 7, and to both end sides of this fixed member 7, 2-fiber array implements 5a-5d are connected, optical fibers 8-15 are connected to both end sides of each optical branch/ coupling waveguide pattern through the 2-fiber array implements 5a-5d, and single core optical connectors 16, 17, a 2-core optical connector 18, a 2-core optical connector 19, and a 2-core optical connector are connected to the optical fibers 8, 9 the optical fibers 10, 11, the optical fibers 12, 13, and the optical fibers 14, 15 respectively, and an output signal from the optical branch/coupling waveguide is led to different places through the 2-core optical connector 19, 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveguide and an optical fiber connection.

[0002]

2. Description of the Related Art FIG. 4 shows a schematic structure of a conventional general optical branching / coupling device. In the figure, one optical branch coupling waveguide 2 is formed in the waveguide chip 1, and optical fibers 3a to 3d are connected to both ends of this optical branch coupling waveguide 2. The optical branching / coupling waveguide 2 is formed by arranging the waveguides 2a and 2b close to each other in the central portion and providing the proximity section L over a predetermined length. The degree of proximity of the waveguides 2a and 2b and the wavelength of the optical signal Proximity section L determined by the balance with
The ratio of the distribution of the optical signal input from the 3a side to the optical fibers 3c and 3d is determined by the length of, and the optical branching couplers with various distribution ratios are designed by changing the degree of proximity and the proximity section L. To be done. Conventionally,
For example, the optical fibers 3a and 3b on the input side are guided to the same transmitting place by an optical code or an optical cable, and similarly, the optical fibers 3c and 3d are also guided to the same receiving place by an optical fiber code or an optical cable and processed. It was something.

[0003]

However, in the conventional optical branching / coupling device, a pair of waveguides 2a and 2b are formed on the waveguide chip 1, and the optical fibers of, for example, 3a and 3b on the signal input side are the same. Since the optical fibers 3c and 3d on the output side are guided to the same receiving location where the destinations are the same, the signal processing is performed. Optical branching / coupling devices to which each optical fiber is connected must be added accordingly, and the optical signal supplied from the input side by a multi-core optical fiber is passed through the optical branching / coupling device and then branched to be different. There was the inconvenience of being unable to lead to the location and perform signal processing.

The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to allow an input signal to pass through a device such as an optical branching / coupling device and then be branched to be led to different places. An object is to provide a device for connecting a waveguide and an optical fiber.

[0005]

In order to achieve the above object, the present invention is configured as follows. That is, the present invention is, in an apparatus for connecting a waveguide substrate formed with a plurality of device patterns and an optical fiber, at least at one end face of the waveguide substrate, a plurality of fiber array tools are connected, and each of these fibers The arrangement is characterized in that the optical fiber is connected to the device pattern by being regulated by the arrangement tool.

[0006]

In the present invention having the above structure, when an optical signal is supplied from a multi-core optical fiber to the input side of a device pattern such as a plurality of optical branching / coupling waveguides, it is output according to the design conditions of the optical branching / coupling waveguides. Optical signals are branched into the side waveguide at a predetermined rate. Then, the optical branching / coupling waveguide is guided from the exit side of the optical branching / coupling waveguide to an optical fiber arranging tool of a single core or multiple cores through the optical fiber, and is connected to the optical fiber arranging tool collectively for each destination. The output signal of is guided to a different place and the desired signal processing is performed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of an optical branching / coupling device for connecting a waveguide and an optical fiber according to the present invention, and FIG. 2 shows a structural example of an optical branching / coupling waveguide pattern in the same embodiment. ing. In this embodiment, as shown in FIG. 2, the waveguides 2a and 2b are provided on the waveguide chip 1 as the waveguide forming substrate.
A first optical branch-coupling waveguide pattern consisting of
A second optical branching / coupling waveguide pattern composed of c and 2d is formed on the end side for each destination. The waveguide chip 1 is housed in a fixing member 7 such as a frame, and a plurality of two-fiber arranging tools 5 are provided on both ends of the fixing member 7.
a to 5d are connected and fixed using an adhesive 6. Each of the two-fiber arranging tools 5a to 5d is provided with a position restricting means (not shown) such as a V groove for restricting the position of the arranging pitch of the two-fiber optical fibers.
The optical fibers 8 and 9 are arranged in position a in a controlled manner, the optical fiber 8 is connected to the end A of the waveguide 2a, and the optical fiber 9 is connected to the end E of the waveguide 2c.

Similarly, the optical fiber 10 is connected to the end B of the waveguide 2b with its position regulated by the two-fiber arrangement 5b, and the optical fiber 11 is connected to the end F of the waveguide 2d. .. Similarly, the optical fiber 12 has an end portion C of the waveguide 2a.
The optical fiber 13 is connected to the end G of the waveguide 2c, the optical fiber 14 is positionally regulated by the two-fiber arranging tool 5d to the end D of the waveguide 2b, and the optical fiber 15 is the end of the waveguide 2d. It is connected to each part H. And the optical fiber 8
A single-core optical connector 16 is connected to the other end of the optical fiber 9, and a single-core optical connector 17 is connected to the other end of the optical fiber 9. Also,
A two-core optical connector 18 is provided at the other ends of the optical fibers 10 and 11, a two-core optical connector 19 is provided at the other ends of the optical fibers 12 and 13, and a two-core optical connector is provided at the other ends of the optical fibers 14 and 15. The connectors 20 are respectively connected.

Therefore, according to this embodiment, for example,
By inputting an optical signal from the single-core optical connectors 16 and 17, the optical signal is branched and coupled by the first optical branch coupling waveguide pattern and the second optical branch coupling waveguide pattern, The optical signals extracted by this optical branching coupling are combined by the two-fiber arranging tools 5c and 5d for each destination, and then guided to different places through the optical lines connected to the two-fiber optical connectors 19 and 20 and desired. Signal processing will be performed.

The optical branching / coupling device of the present embodiment can take various modes of use. FIG. 3 shows an example of use in which the optical branching / coupling device of the present embodiment is combined with the line monitoring device 21.
In the figure, the single-core optical connectors 16 and 17 of the optical branching / coupling device are respectively connected to an optical terminal device 22 for transmitting and receiving optical signals, and the double-core optical connector 19 is connected to an optical line (not shown). The signals of the optical fibers 12 and 13 are guided to a desired location for signal processing. Also, the two-fiber optical connector 18
And 20 are connected to the optical line monitoring device 21.

In this device, for example, the single-fiber optical connector 1
An optical signal is supplied from each of the 6 and 17 sides, and an optical signal supplied from the single-core optical connector 16 side is the entrance end A of the waveguide 2a.
The optical signal supplied from the single-core optical connector 17 enters the entrance end E of the waveguide 2c and the exit end G passes through the optical fiber 13 through the optical fiber 12. Optical communication has been carried out. In this state, a part of the optical signal supplied from the optical fiber 8 side is branched to the waveguide 2b side, and from the exit end D thereof through the optical fiber 14 to the connector.
It enters the line monitoring device 21 from 20 and enters the optical fiber 10 on the connector 18 side. Similarly, in the optical signal of the optical fiber 9, a part of the light is guided by the second optical branching / coupling waveguide 2d.
Is branched to the exit end H side of, and the branched light enters the optical line monitoring device 23 from the optical fiber 15 through the two-fiber optical connector 20,
Further, it enters the optical fiber 11 from the two-fiber optical connector 18 side.

As described above, since a part of the optical communication signal enters the optical line monitoring device 23 side, the optical line monitoring device 23 monitors these lights so that the optical communication is normally performed, or It is possible to constantly monitor whether or not an abnormality has occurred in the optical communication due to the disconnection of the optical line due to construction, etc., and in the event of an abnormality, it is possible to take prompt action such as repair.

The present invention is not limited to the above-mentioned embodiment, and various embodiments can be adopted. For example, in the above embodiment, two optical branching / coupling waveguide patterns are formed on the waveguide chip 1, but three or more optical branching / coupling waveguide patterns are formed, and branching / coupling is performed in each optical branching / coupling waveguide. It becomes possible to collect optical signals for each destination with an optical fiber arranged in an optical fiber arranging tool and to guide them to various places by using a single-core or multi-core optical connector.

Although the device waveguide pattern has been described as an example of the optical branch coupling waveguide pattern in the embodiments, the present invention is applicable to various other waveguide patterns.

Further, in the above-mentioned embodiment, the fiber arranging tool is arranged at both ends of the waveguide forming substrate (waveguide chip), but it may be arranged at one end of the waveguide forming substrate.

[0016]

According to the present invention, a plurality of device waveguide patterns are formed on a waveguide forming substrate, and the waveguide patterns are collected for each destination on the end face of the waveguide substrate, and at least one end face of the waveguide substrate is formed. Since a plurality of optical fiber arranging tools are connected to each other, it is possible to guide an optical signal branched and coupled by a waveguide to various different places through a line connected to an optical connector to perform desired signal processing. It becomes possible and very convenient to use, and is very advantageous in developing a new optical communication system.

[Brief description of drawings]

FIG. 1 is an external configuration diagram of an optical branching / coupling device that is an embodiment of a device of the present invention.

FIG. 2 is an explanatory diagram showing a mode of forming an optical branch coupling waveguide pattern in the example.

FIG. 3 is an explanatory diagram showing an application example in which the optical branching / coupling device of the embodiment is combined with an optical line monitoring device to form a monitoring system for optical communication.

FIG. 4 is a schematic explanatory view of a conventional general optical branching / coupling device.

[Explanation of symbols]

 1 Waveguide Chip 2a to 2d Waveguide 5a to 5d Two-core fiber array tool 8-15 Optical fiber 16,17 Single-core optical connector 18,19,20 Two-core optical connector

Claims (1)

[Claims] 1. An apparatus for connecting an optical fiber to a waveguide substrate formed with a plurality of device patterns, wherein at least one end face of the waveguide substrate is connected with a plurality of fiber arranging tools, and each of these fiber arrays is arranged. A waveguide-optical fiber connection device, wherein the optical fiber is connected to a device pattern by being positionally controlled by a tool.